Static bending, free and forced vibration responses of organic nanobeams in a temperature environment

IF 2.2 3区 工程技术 Q2 MECHANICS Archive of Applied Mechanics Pub Date : 2023-06-24 DOI:10.1007/s00419-023-02469-2
Pham Van Lieu, Gia Thien Luu
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Abstract

For the first time, this work employs analytic solutions to study static bending, as well as free and forced vibrations of organic nanobeams, including the impact of temperature. Calculation formulas are developed on the basis of the third-order shear strain theory of thickness. These formulas also account for the influence of the size effect by using nonlocal parameters. In contrast to the findings of earlier research on nanobeams, the nonlocal parameter in this investigation fluctuates with beam thickness. In addition to this, the viscous drag parameter of the beam is taken into consideration, which further complicates the calculation method, but this is also the new point of this work. The equation is developed using the potential work principle, and the Navier form solution is used to solve the resulting equilibrium equations. Nanobeams' natural frequency and static displacement have both real and complicated components due to the involvement of the drag parameter. The research also includes some numerical calculation findings for elucidating the impact of temperature and nonlocal parameters on the static bending response and free and forced vibration of organic nanobeams.

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有机纳米梁在温度环境中的静态弯曲、自由和强迫振动响应
这项工作首次采用解析解来研究有机纳米梁的静态弯曲、自由振动和强迫振动,包括温度的影响。根据厚度的三阶剪切应变理论,推导了厚度的计算公式。这些公式还通过使用非局部参数来考虑尺寸效应的影响。与早期对纳米束的研究结果相反,本研究中的非局部参数随着束厚度的变化而波动。除此之外,还考虑了梁的粘性阻力参数,这使计算方法更加复杂,但这也是本工作的新点。该方程是利用势功原理发展起来的,Navier形式的解用于求解由此产生的平衡方程。由于阻力参数的影响,纳米梁的固有频率和静态位移既有真实分量,也有复杂分量。该研究还包括一些数值计算结果,以阐明温度和非局部参数对有机纳米梁静态弯曲响应以及自由和强迫振动的影响。
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来源期刊
CiteScore
4.40
自引率
10.70%
发文量
234
审稿时长
4-8 weeks
期刊介绍: Archive of Applied Mechanics serves as a platform to communicate original research of scholarly value in all branches of theoretical and applied mechanics, i.e., in solid and fluid mechanics, dynamics and vibrations. It focuses on continuum mechanics in general, structural mechanics, biomechanics, micro- and nano-mechanics as well as hydrodynamics. In particular, the following topics are emphasised: thermodynamics of materials, material modeling, multi-physics, mechanical properties of materials, homogenisation, phase transitions, fracture and damage mechanics, vibration, wave propagation experimental mechanics as well as machine learning techniques in the context of applied mechanics.
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